APA (7th ed.) Citation

(1991). A comprehensive grammar of the English language (9. impr. (revised).). Longman.

Chicago Style (17th ed.) Citation

A Comprehensive Grammar of the English Language. 9. impr. (revised). London [u.a.]: Longman, 1991.

MLA (9th ed.) Citation

A Comprehensive Grammar of the English Language. 9. impr. (revised). Longman, 1991.

Warning: These citations may not always be 100% accurate.